/*
 * Copyright (C) 2004 NNL Technology AB
 * Visit www.infonode.net for information about InfoNode(R) 
 * products and how to contact NNL Technology AB.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
 * MA 02111-1307, USA.
 */

// $Id: DynamicUIManager.java,v 1.11 2005/12/04 13:46:04 jesper Exp $
package net.infonode.gui;

import javax.swing.*;
import java.awt.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.ArrayList;

public class DynamicUIManager {
	private static final DynamicUIManager instance = new DynamicUIManager();

	private ArrayList listeners = new ArrayList(2);
	private ArrayList prioritizedListeners = new ArrayList(2);

	private String[] properties = { "win.3d.backgroundColor", "win.3d.highlightColor", "win.3d.lightColor", "win.3d.shadowColor",
			"win.frame.activeCaptionColor", "win.frame.activeCaptionGradientColor", "win.frame.captionTextColor", "win.frame.activeBorderColor",
			"win.mdi.backgroundColor", "win.desktop.backgroundColor", "win.frame.inactiveCaptionColor", "win.frame.inactiveCaptionGradientColor",
			"win.frame.inactiveCaptionTextColor", "win.frame.inactiveBorderColor", "win.menu.backgroundColor", "win.menu.textColor",
			"win.frame.textColor?????", "win.item.highlightColor", "win.item.highlightTextColor", "win.tooltip.backgroundColor", "win.tooltip.textColor",
			"win.frame.backgroundColor", "win.frame.textColor", "win.item.hotTrackedColor" };
	private Toolkit currentToolkit;
	private boolean propertyChangePending;

	public static DynamicUIManager getInstance() {
		return instance;
	}

	private DynamicUIManager() {
		final PropertyChangeListener l = new PropertyChangeListener() {
			@Override
			public void propertyChange(PropertyChangeEvent event) {
				handlePropertyChanges();
			}
		};

		UIManager.addPropertyChangeListener(new PropertyChangeListener() {
			@Override
			public void propertyChange(PropertyChangeEvent event) {
				if ("lookAndFeel".equals(event.getPropertyName())) {
					setupPropertyListener(l);
					fireLookAndFeelChanging();
					fireLookAndFeelChanged();
				}
			}
		});
		UIManager.getDefaults().addPropertyChangeListener(new PropertyChangeListener() {
			@Override
			public void propertyChange(PropertyChangeEvent event) {
				if (!(event.getNewValue() instanceof Class))
					handlePropertyChanges();
			}
		});

		setupPropertyListener(l);
	}

	private void setupPropertyListener(PropertyChangeListener l) {
		if (currentToolkit != null)
			for (int i = 0; i < properties.length; i++)
				currentToolkit.removePropertyChangeListener(properties[i], l);

		currentToolkit = Toolkit.getDefaultToolkit();
		for (int i = 0; i < properties.length; i++) {
			currentToolkit.addPropertyChangeListener(properties[i], l);
		}
	}

	public void addListener(DynamicUIManagerListener l) {
		listeners.add(l);
	}

	public void removeListener(DynamicUIManagerListener l) {
		listeners.remove(l);
	}

	public void addPrioritizedListener(DynamicUIManagerListener l) {
		prioritizedListeners.add(l);
	}

	public void removePrioritizedListener(DynamicUIManagerListener l) {
		prioritizedListeners.remove(l);
	}

	private void fireLookAndFeelChanging() {
		Object l[] = prioritizedListeners.toArray();
		Object l2[] = listeners.toArray();

		for (int i = 0; i < l.length; i++)
			((DynamicUIManagerListener) l[i]).lookAndFeelChanging();

		for (int i = 0; i < l2.length; i++)
			((DynamicUIManagerListener) l2[i]).lookAndFeelChanging();
	}

	private void fireLookAndFeelChanged() {
		Object l[] = prioritizedListeners.toArray();
		Object l2[] = listeners.toArray();

		for (int i = 0; i < l.length; i++)
			((DynamicUIManagerListener) l[i]).lookAndFeelChanged();

		for (int i = 0; i < l2.length; i++)
			((DynamicUIManagerListener) l2[i]).lookAndFeelChanged();
	}

	private void handlePropertyChanges() {
		if (!propertyChangePending) {
			propertyChangePending = true;

			SwingUtilities.invokeLater(new Runnable() {
				@Override
				public void run() {
					propertyChangePending = false;

					firePropertyChanged();
				}
			});

			firePropertyChanging();
		}
	}

	private void firePropertyChanging() {
		Object l[] = prioritizedListeners.toArray();
		Object l2[] = listeners.toArray();

		for (int i = 0; i < l.length; i++)
			((DynamicUIManagerListener) l[i]).propertiesChanging();

		for (int i = 0; i < l2.length; i++)
			((DynamicUIManagerListener) l2[i]).propertiesChanging();
	}

	private void firePropertyChanged() {
		Object l[] = prioritizedListeners.toArray();
		Object l2[] = listeners.toArray();

		for (int i = 0; i < l.length; i++)
			((DynamicUIManagerListener) l[i]).propertiesChanged();

		for (int i = 0; i < l2.length; i++)
			((DynamicUIManagerListener) l2[i]).propertiesChanged();
	}
}
